US5015164A - Rotary compressor having long length blade - Google Patents

Rotary compressor having long length blade Download PDF

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Publication number
US5015164A
US5015164A US07/391,710 US39171089A US5015164A US 5015164 A US5015164 A US 5015164A US 39171089 A US39171089 A US 39171089A US 5015164 A US5015164 A US 5015164A
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United States
Prior art keywords
blade
compressing
guide groove
cylinder
rotor
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/391,710
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English (en)
Inventor
Motohiro Kudou
Yutaka Sasahara
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Toshiba Corp
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Toshiba Corp
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Publication date
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Publication of US5015164A publication Critical patent/US5015164A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
    • F04C18/3564—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution

Definitions

  • This invention relates to rotary compressors used for an apparatus, e.g., air conditioners, refrigerators, etc., for compressing a gaseous fluid.
  • FIGS. 1 and 2 show a conventional rotary compressor.
  • a rotary compressor 11 typically includes a cylinder 13, a rotation shaft 15 and a blade 17.
  • a compressing chamber 19 is defined by the inner surface of cylinder 13.
  • a pair of bearing (not shown) are respectively arranged to the opposite ends of cylinder 13 to establish compressing chamber 19.
  • Rotation shaft 15 penetrates compressing chamber 19 and is rotatably supported by the pair of bearings.
  • Compressing chamber 19 is provided with a roller 21.
  • a penetrating hole is formed at the center of roller 21. Rotation shaft 15 extends through the penetrating hole.
  • roller 21 eccentrically rotates along the inner surface of cylinder 13 in response to the rotation of shaft 15.
  • a blade guide groove 23 extends from the inner surface of cylinder 13 toward the outer surface of cylinder 13 in the radial direction of cylinder 13.
  • Blade 17 which has a length l 1 is disposed in blade guide groove 23, and is forcibly urged toward roller 21 by a spring 25 shown in FIG. 3 to reciprocate along balde guide groove 23 in response to the eccentric rotation of roller 21.
  • one end of spring 25 is supported by a channel formed at the one side of blade 17.
  • Blade 17 partitions compressing chamber 19 into a high pressure cell and a low pressure cell for compressing a gaseous fluid, e.g., refrigerant, fed to compressing chamber through an intake port 27 in response to the eccentric rotation of shaft 15.
  • a gaseous fluid e.g., refrigerant
  • inventors of the present invention have attempted to increase the length of blade 17 in a reciprocating direction.
  • the length of blade guide groove 23 also was increased.
  • the contacting area between blade 17 and blade guide groove 23 can be increased in the reciprocating direction when blade 17 is at the lower dead point.
  • the stiffness of cylinder 13 decreases because of the increase of the length of blade guide groove 23.
  • the thickness of cylinder 13 should be increased so that the stiffness of cylinder 13 is increased, resulting in a large external shape of compressor 11 as well as the increase in cost.
  • a rotary compressor includes a cylinder having a substantially cylindrical compressing chamber for temporarily storing a gaseous fluid, and a guide groove extending from the compressing chamber in a radial direction.
  • the rotary compressor also includes a reciprocally movable blade disposed in the guide groove for partitioning the compressing chamber into a first cell and a second cell.
  • the movable blade includes at least one projection extending from one of the ends of the movable blade toward the bottom portion of the guide groove.
  • the guide groove is provided with at least one depression at the bottom portion thereof for permitting the projection of the movable blade to reciprocally move into the depression.
  • the rotary compressor further includes an eccentrically rotatable rotor associated with the movable blade for compressing the gaseous fluid in the compressing chamber to a prescribed level.
  • FIG. 1 is a cross sectional view illustrating a conventional rotary compressor when a blade is positioned at a lower dead point
  • FIG. 2 is a cross sectional view illustrating the rotary compressor of FIG. 1 when the blade is positioned at an upper dead point;
  • FIG. 3 is a sectional view taken on line III--III of FIG. 2;
  • FIG. 4 is a cross sectional view illustrating a rotary compressor of one embodiment of the present invention when a blade is positioned at a lower dead point;
  • FIG. 5 is a cross sectional view illustrating the rotary compressor of FIG. 4 when the blade is disposed at an upper dead point;
  • FIG. 6 is a sectional view taken on line VI--VI of FIG. 5;
  • FIG. 7 is a schematic view illustrating a relationship between forces respectively acting on the opposite ends of a blade guide groove and a frictional force acting on the blade in response to the rotation of a rotor.
  • FIGS. 4, 5 and 6 show one embodiment of the present invention. However, in the drawings, same numerals are applied to the similar element, and therefore, the detailed descriptions thereof are not repeated.
  • a pair of projecting portions 17a, 17b extend, in a reciprocating direction, from an end portion of blade 17 opposite to the other end portion which contacts roller 21 of rotation shaft 15.
  • Each projecting portion 17a, 17b is disposed at each outer portion (right-most and left-most portions in FIG. 6), and extends at a prescribed projection length l 1 . Therefore, the substantial length of blade 17 in the reciprocating direction increases by the length l 1 of projecting portion 17a, 17b compared with the prior art.
  • the total length of blade 17 is indicated by a value (l 1 +l 2 ).
  • a pair of depressions 29a, 29b are respectively formed to the surface of a portion of cylinder 13 corresponding to the projected end of each projecting portion 17a, 17b of blade 17.
  • each depressions 29a, 29b prevent each projecting portion 17a, 17b from colliding with the inner surface of blade guide groove 23 when blade 17 is positioned at an upper dead point, as shown in FIG. 5.
  • each depressions 29a, 29b is formed such that it is respectively concaved from the opposite surface of cylinder 13, as shown in FIG. 6.
  • each force Q a , Q b is respectively a force of the blade acting on the blade guide groove due to a force F and is respectively expressed by the following equations: ##EQU1##
  • F is the force acting on the blade as a result of the difference in pressures on opposite sides of the blade resulting from the compression of gas
  • L 1 is the length of the blade which is in the compressing chamber
  • l is the length of the blade which is in contact with the blade guide groove.
  • each force Q a1 , Q b1 of the conventional rotary compressor shown in FIGS. 1 and 2 is respectively expressed by the following equations (C) and (D) when the length l is substituted by a length L 2 : ##EQU2##
  • Each force Q a2 , Q b2 of the one embodiment also is respectively expressed by the following equations (E) and (F) in accordance with the equations (A) and (B) when the length l is substituted by a length (L 2 +l 2 ): ##EQU3##
  • the force Q a2 of the rotary compressor of the one embodiment is smaller than the force Q a1 of the conventional rotary compressor.
  • the force Q b2 of the rotary compressor of the one embodiment is smaller than the force Q b1 of the conventional rotary compressor when the equations (D) and (F) are compared with one the other. Therefore, the forces respectively acting on the opposite ends of the contacting portion of the blade in one embodiment are smaller than that of the conventional rotary compressor.
  • the pressure acting on a unit area of the inner side surface of the blade guide groove by the blade also reduces.
  • power consumption of the rotary compressor may reduce.
  • defacement of the contacting portions of the blade and the blade guide groove may decrease. Since the pair of depressions rarely reduce the stiffness of the cylinder, increase of thickness of the cylinder is not required. Therefore, the increase of the external shape of the rotary compressor may be avoided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
US07/391,710 1987-07-28 1989-08-10 Rotary compressor having long length blade Expired - Fee Related US5015164A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62-115485[U] 1987-07-28
JP1987115485U JPS6421286U (id) 1987-07-28 1987-07-28

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US07212673 Continuation 1988-06-28

Publications (1)

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US5015164A true US5015164A (en) 1991-05-14

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Family Applications (1)

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US07/391,710 Expired - Fee Related US5015164A (en) 1987-07-28 1989-08-10 Rotary compressor having long length blade

Country Status (3)

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US (1) US5015164A (id)
JP (1) JPS6421286U (id)
KR (1) KR920001732Y1 (id)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443376A (en) * 1992-12-17 1995-08-22 Goldstar Co., Ltd. Lubricating device for horizontal type rotary compressor
US20080056923A1 (en) * 2006-08-30 2008-03-06 Samsung Electronics Co., Ltd. Rotary compressor
US8794941B2 (en) 2010-08-30 2014-08-05 Oscomp Systems Inc. Compressor with liquid injection cooling
US9267504B2 (en) 2010-08-30 2016-02-23 Hicor Technologies, Inc. Compressor with liquid injection cooling
CN108252910A (zh) * 2017-11-30 2018-07-06 刘悦吟 一种压缩机
CN108603505A (zh) * 2016-02-15 2018-09-28 三菱电机株式会社 旋转式压缩机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020109281A (ja) * 2019-01-07 2020-07-16 三菱重工サーマルシステムズ株式会社 ロータリ圧縮機
JPWO2023152799A1 (id) * 2022-02-08 2023-08-17

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458018A (en) * 1944-07-19 1949-01-04 Gen Motors Corp Refrigeration compressor starting unloader
DE942066C (de) * 1954-01-26 1956-04-26 Cav Ltd Kolbenpumpe
JPS5495913A (en) * 1978-01-14 1979-07-28 Nippon Yakin Kogyo Co Ltd Austenitic stainless steel having good corrosion resistivity
JPS5710495A (en) * 1980-06-23 1982-01-20 Tokyo Shibaura Electric Co Position regulating device of fuel gripper
US4561829A (en) * 1983-03-10 1985-12-31 Hitachi, Ltd. Rotary compressor with tapered valve ports for lubricating pump
JPS6282291A (ja) * 1985-10-07 1987-04-15 Matsushita Electric Ind Co Ltd 密閉形回転式圧縮機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458018A (en) * 1944-07-19 1949-01-04 Gen Motors Corp Refrigeration compressor starting unloader
DE942066C (de) * 1954-01-26 1956-04-26 Cav Ltd Kolbenpumpe
JPS5495913A (en) * 1978-01-14 1979-07-28 Nippon Yakin Kogyo Co Ltd Austenitic stainless steel having good corrosion resistivity
JPS5710495A (en) * 1980-06-23 1982-01-20 Tokyo Shibaura Electric Co Position regulating device of fuel gripper
US4561829A (en) * 1983-03-10 1985-12-31 Hitachi, Ltd. Rotary compressor with tapered valve ports for lubricating pump
JPS6282291A (ja) * 1985-10-07 1987-04-15 Matsushita Electric Ind Co Ltd 密閉形回転式圧縮機

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443376A (en) * 1992-12-17 1995-08-22 Goldstar Co., Ltd. Lubricating device for horizontal type rotary compressor
US20080056923A1 (en) * 2006-08-30 2008-03-06 Samsung Electronics Co., Ltd. Rotary compressor
US7658599B2 (en) * 2006-08-30 2010-02-09 Samsung Electronics Co., Ltd. Rotary compressor with a filling member in the vane slot
US9856878B2 (en) 2010-08-30 2018-01-02 Hicor Technologies, Inc. Compressor with liquid injection cooling
US9267504B2 (en) 2010-08-30 2016-02-23 Hicor Technologies, Inc. Compressor with liquid injection cooling
US9719514B2 (en) 2010-08-30 2017-08-01 Hicor Technologies, Inc. Compressor
US8794941B2 (en) 2010-08-30 2014-08-05 Oscomp Systems Inc. Compressor with liquid injection cooling
US10962012B2 (en) 2010-08-30 2021-03-30 Hicor Technologies, Inc. Compressor with liquid injection cooling
CN108603505A (zh) * 2016-02-15 2018-09-28 三菱电机株式会社 旋转式压缩机
CN108603505B (zh) * 2016-02-15 2020-09-15 三菱电机株式会社 旋转式压缩机的制造方法
CZ308843B6 (cs) * 2016-02-15 2021-07-07 Mitsubishi Electric Corporation Způsob výroby rotačního kompresoru
CN108252910A (zh) * 2017-11-30 2018-07-06 刘悦吟 一种压缩机
CN108252910B (zh) * 2017-11-30 2024-06-18 刘悦吟 一种压缩机

Also Published As

Publication number Publication date
KR890002922U (ko) 1989-04-08
KR920001732Y1 (ko) 1992-03-13
JPS6421286U (id) 1989-02-02

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